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User manual
ALFA 51 and
ALFANET 51
-50/+150°C (0,1)
Rail-Thermostat
VDH doc. 120818
Software: ALFA(N) 51/61/71 F
* Installation.
On the connection diagram of the ALFA(NET) 51 is shown how the sensors, power supply and relays
are to be connected. After connecting the ALFA(NET) 51 to the power supply, a self test function is
started. As this test is finished, the measured temperature appears in the display. Normally this is the
temperature of sensor-1, unless sensor-2 is active as control sensor (P05=1) in that case the average
temperature of both sensors is displayed and used for control. The ALFANET 51 is by use of the
ALFANET PC-INTERFACE controllable on the PC.
* Control.
The ALFA(NET) 51 thermostat can be controlled by four pushbuttons on the front. These keys are:
SET
> (UP)
? (DOWN)
MODE
* Viewing setpoint.
By pushing the SET key the setpoint appears in the display. The decimal point of the last display starts
blinking. A few seconds after releasing the SET key the setpoint disappears and the measured
temperature is shown again in the display.
* Changing setpoint.
Push the SET key and the setpoint appears in the display. Release the SET key. Now push the SET
key again together with the UP or DOWN keys to change the setpoint. A few seconds after releasing
the keys the measured temperature shows again in the display.
* Viewing the individual sensors.
By pressing the UP and DOWN key together, the individual sensors can be shown in the display. After
releasing the keys, the measured temperature of sensor-1 can be shown by pushing the UP key or the
measured temperature of sensor-2 can be shown by pushing the DOWN key. A few seconds after
releasing the keys the (average) temperature shows again in the display.
* Status of the Relays.
By pushing the MODE key the display shows the status of the relays. Each display segment shows the
status of the relay output, showing 0=off and 1=on. The code 110 means relay 1 and 2 are on and relay
3 is off.
Version: v1.0
File: Do120816.wpd
- view / change of set value and confirm alarms
- increase set value.
- decrease set value.
- relay status key.
1
Date: 09-01-2015
Range: -50/+150,0°C
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Summary of Contents for VDH ALFA 51
- Page 1 User manual ALFA 51 and ALFANET 51 -50/+150°C (0,1) Rail-Thermostat VDH doc. 120818 Version: v1.0 Date: 09-01-2015 Software: ALFA(N) 51/61/71 F File: Do120816.wpd Range: -50/+150,0°C * Installation. On the connection diagram of the ALFA(NET) 51 is shown how the sensors, power supply and relays are to be connected.
- Page 2 Reset Alarm. When a error-messages appears it can be resetted by pushing the SET key. The function of this key depends on parameter P37. * Technical data. Type : ALFA 51 Thermostat or ALFANET 51 Thermostat Range : -50/+150,0°C, above -10°C readout per 0,1°C...
- Page 3 * Parameters ALFA(NET) 51 Para- Description Parameter Range Standard meter value Function Relay 1 1 = Cool 1..3 2 = Heat 3 = Alarm Function Relay 2 (see also P 01) 1..3 Function Relay 3 (see also P 01) 1..3 Function sensor 2 0 = None 0..2 1 = Control...
- Page 4 * Dimensions. * Connections. * Adress. VDH Products BV Tel: +31 (0)50 -30 28 900 Produktieweg 1 Fax: +31 (0)50 -30 28 980 9301 ZS Roden Email: info@vdhproducts.nl The Netherlands Internet: www.vdhproducts.nl...
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